Answer Please see Edition Comparison Chart.
Answer Yes, of course. "Maximum RAM Consumption" has totally no relation to the installed physical memory. It refers to the sum of memory amount used in all ram-disks/hybrid-disks. So here you still can create, for example, an 8GB ram-disk, or two 4GB ram-disks.
Answer Download the latest version of Primo Ramdisk setup program, and then run this setup program following the wizard. After completion, you may need to restart your computer. You don't need to uninstall the old version at all before upgrade.
Answer If you purchased VSuite Ramdisk before 2012-04-05, you are able to upgrade to Primo Ramdisk without any charge. Please see VSuite Ramdisk Upgrade Policy.
Answer 1. Primo Ramdisk Standard Edition does not support the image file feature. You have to use the Professional/Ultimate/Server Edition.
2. Currently hybrid-disks do not support the image file feature. And file-disks do not need the image file. So the image file options are only available to the ram-disks.
Answer 1. Check if you have updated your Primo Ramdisk to version 5.5.0 or newer.
2. Make sure that your computer supports Invisible Memory and you have enabled Windows PAE feature.
See Invisible Memory Prerequisites.
3. You must run Primo Ramdisk with administrative privileges.
Answer Windows cannot support the pagefile on drive A: or B:, so please change the drive letter of the ramdisk to a letter other than A and B.
Answer See Primo Ramdisk Vs. PrimoCache.